Thermo King SB-190 30, Руководство пользователя

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Engine Maintenance (Rev. 12/03)
40
2. Open the engine block drain and completely drain the
coolant. Observe the coolant color. If the coolant is
dirty, proceed with a, b and c. Otherwise go to 3.
CAUTION: Avoid direct contact with hot cool-
ant.
a. Run clear water into the radiator and allow it to
drain out of the block until it is clear.
b. Close the block drain and install a commercially
available radiator and block flushing agent, and
operate the unit in accordance with instructions of
the flushing agent manufacturer.
c. Open the engine block drain to drain the water and
flushing solution.
CAUTION: Avoid direct contact with hot
coolant.
3. Run clear water into the radiator, and allow it to drain
out of the block until it is clear.
4. Inspect all hoses for deterioration and hose clamp tight-
ness. Replace if necessary.
5. Loosen the water pump belt. Check the water pump
bearing for looseness.
6. Inspect the radiator cap. Replace the cap if the gasket
shows any signs of deterioration.
7. Mix 3.8 liters (one gallon) of permanent type antifreeze
concentrate meeting GM 6038-M specification and
3.8 liters (one gallon) clean water in a container to
make a 50/50 mixture. (Do not add antifreeze and then
add water to the unit. This procedure may not give a
true 50/50 mixture because the exact cooling system
capacity may not always be known.)
8. Refill the radiator with the 50/50 antifreeze mixture and
make sure to bleed the air from the cooling system as
needed.
Bleeding Air from the Cooling System
Jiggle pin thermostats are original equipment on units that
have se 2.2 engines. Jiggle pin thermostats make it unnec-
essary to bleed the air out of the engine block because they
keep air from being trapped in the engine block. Normally,
when the cooling system is drained, approximately 7.6
liters (8 quarts) of coolant drain out. If approximately 3.8
liters (4 quarts) of coolant seem to fill the cooling system
after it has been drained, air has been trapped in the block.
Bleed the air out of the block using the following proce-
dure:
CAUTION: IF YOU SUSPECT THAT AIR IS
TRAPPED IN THE BLOCK, DO NOT START
THE ENGINE WITHOUT BLEEDING THE AIR
OUT OF THE BLOCK. REFER TO SERVICE
BULLETIN T&T 029.
NOTE: If an engine runs with air trapped in the block,
the engine may be damaged. The high water temperature
switch may not protect an engine that has air trapped in
the block, because the high water temperature switch is
designed to protect an engine from overheating due to fail-
ures in the cooling system.
1. Disconnect the bypass hose from the thermostat hous-
ing until coolant comes out of the bypass hose fitting on
the thermostat housing.
2. Connect the bypass hose to the thermostat housing.
3. Pour coolant into the system until it appears to be full.
4. Make sure that the amount of coolant that goes back
into the system is approximately equal to the amount of
coolant that came out of the system.
5. Start the unit on low speed, let it run for a minute, and
then shut it off.
6. Check the coolant level and add coolant if necessary.
7. Repeat steps 5 and 6 until the coolant level stabilizes.